Polyvinyl chloride (PVC) yog ib qho ntawm feem ntau siv thermoplasuricity polymers hauv lub ntiaj teb (tom ntej no tsuas yog siv ntau dua cov plastics zoo li tsiaj thiab pp). Nws yog ib qho dawb dawb thiab heev nkig (ua ntej rau kev sib ntxiv ntawm cov yas) yas. PVC tau nyob ib puag ncig ntev dua li feem ntau plastics tau ua thawj synthesized xyoo 1872 thiab kev lag luam tsim los ntawm Bf Goodrich tuam txhab hauv xyoo 1920. Los ntawm kev sib piv, ntau lwm cov kev sib tw uas tau ua thawj zaug ua ntej thiab tau pib ua lag luam tsuas yog nyob rau xyoo 1940 thiab xyoo 1950. Nws yog feem ntau hauv kev tsim kho kev tsim kho tab sis kuj yog siv rau cov cim, kev siv healthcare, thiab muaj fiber ntau rau khaub ncaws.
PVC yog tsim nyob rau hauv ob daim ntawv dav dav, ua ntej li qhov tsis sib xws lossis tsis muaj peev xwm lossis hloov kho (RPVC lossis UPVC), thiab thib ob yog cov yas saj. Saj zawg zog, yas lossis tsis tu ncua) yog softer thiab ntau ntxiv rau khoov dua li upvc vim qhov sib ntxiv xws li phthalate (piv txwv li Diininonyl phthalate lossis decp). Saj zawg zog PVC feem ntau siv hauv kev tsim kho los ntawm cov xov hlau hluav taws xob lossis hauv tsev kho mob, tsev kawm ntawv uas tsis muaj menyuam, thiab qee qhov chaw hloov rau roj hmab.
Rigid PVC kuj tseem siv rau kev tsim kho raws li cov yeeb nkab rau cov kav dej thiab rau cov nus uas tau hais txog ntawm lub sij hawm "Vinyl" hauv Tebchaws Asmeskas. PVC yeeb nkab feem ntau yog xa mus rau los ntawm nws "Sijhawm" (piv txwv li sijhawm 40 lossis sijhawm 80). Tseem ceeb sib txawv ntawm cov sij hawm qhia suav nrog cov khoom xws li phab ntsa tuab, siab ntaus nqi, thiab xim.
Qee tus ntawm PVC yas cov tseem ceeb tshaj plaws suav nrog nws tus nqi tseem ceeb, nws txoj kev tiv taus tsis tshua muaj tshuaj (nrog rau cov tshuaj lom neeg ib puag ncig rau cov yas hauv cov yas ntawm cov roj rigid pvc. Nws yog dav, feem ntau siv thiab yooj yim rov siv dua tshiab (categorized los ntawm cov code resin cim "3").
Lub sijhawm Post: Feb-02-2021
